Investment Securities - Available-for-sale Securities by Maturities (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		$ 49,139
Debt securities, maturing 1 to 5 years, amortized cost		158,808
Debt securities, maturing 5 to 10 years, amortized cost		202,881
Debt securities, maturing over 10 years, amortized cost		785,693
Amortized Cost		1,196,521	$ 1,300,719
Debt securities, maturing within 1 year, fair value		48,614
Debt securities, maturing 1 to 5 years, fair value		150,241
Debt securities, maturing 5 to 10 years, fair value		176,876
Debt securities, maturing over 10 years, fair value		673,766
Debt securities	[1]	$ 1,049,497	1,131,399
Available-for-sale securities, maturing within 1 year, weighted average yield		2.58%
Available-for-sale securities, maturing 1 to 5 years, weighted average yield		2.27%
Available-for-sale securities, maturing 5 to 10 years, weighted average yield		1.69%
Available-for-sale securities, maturing over 10 years, weighted average yield		1.89%
Available-for-sale securities, total weighted average yield		1.93%
U.S. Treasury and government agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		$ 12,495
Debt securities, maturing 1 to 5 years, amortized cost		49,089
Debt securities, maturing 5 to 10 years, amortized cost		0
Debt securities, maturing over 10 years, amortized cost		0
Amortized Cost		61,584	158,473
Debt securities, maturing within 1 year, fair value		12,195
Debt securities, maturing 1 to 5 years, fair value		46,243
Debt securities, maturing 5 to 10 years, fair value		0
Debt securities, maturing over 10 years, fair value		0
Debt securities		58,438	152,422
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		9,309
Debt securities, maturing 1 to 5 years, amortized cost		47,321
Debt securities, maturing 5 to 10 years, amortized cost		45,042
Debt securities, maturing over 10 years, amortized cost		8,255
Amortized Cost		109,927	101,753
Debt securities, maturing within 1 year, fair value		9,154
Debt securities, maturing 1 to 5 years, fair value		44,088
Debt securities, maturing 5 to 10 years, fair value		38,785
Debt securities, maturing over 10 years, fair value		6,284
Debt securities		98,311	88,115
States and political subdivisions
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		25,699
Debt securities, maturing 1 to 5 years, amortized cost		47,241
Debt securities, maturing 5 to 10 years, amortized cost		67,302
Debt securities, maturing over 10 years, amortized cost		114,281
Amortized Cost		254,523	261,612
Debt securities, maturing within 1 year, fair value		25,637
Debt securities, maturing 1 to 5 years, fair value		45,497
Debt securities, maturing 5 to 10 years, fair value		57,761
Debt securities, maturing over 10 years, fair value		96,101
Debt securities		224,996	225,882
Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		1
Debt securities, maturing 1 to 5 years, amortized cost		1,415
Debt securities, maturing 5 to 10 years, amortized cost		56,175
Debt securities, maturing over 10 years, amortized cost		639,861
Amortized Cost		697,452	707,025
Debt securities, maturing within 1 year, fair value		1
Debt securities, maturing 1 to 5 years, fair value		1,358
Debt securities, maturing 5 to 10 years, fair value		51,295
Debt securities, maturing over 10 years, fair value		552,616
Debt securities		605,270	604,653
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		1,635
Debt securities, maturing 1 to 5 years, amortized cost		7,463
Debt securities, maturing 5 to 10 years, amortized cost		29,862
Debt securities, maturing over 10 years, amortized cost		23,296
Amortized Cost		62,256	61,091
Debt securities, maturing within 1 year, fair value		1,627
Debt securities, maturing 1 to 5 years, fair value		6,771
Debt securities, maturing 5 to 10 years, fair value		24,990
Debt securities, maturing over 10 years, fair value		18,765
Debt securities		52,153	50,049
Bank-issued trust preferred securities
Schedule of Available-for-sale Securities
Debt securities, maturing within 1 year, amortized cost		0
Debt securities, maturing 1 to 5 years, amortized cost		6,279
Debt securities, maturing 5 to 10 years, amortized cost		4,500
Debt securities, maturing over 10 years, amortized cost		0
Amortized Cost		10,779	10,765
Debt securities, maturing within 1 year, fair value		0
Debt securities, maturing 1 to 5 years, fair value		6,284
Debt securities, maturing 5 to 10 years, fair value		4,045
Debt securities, maturing over 10 years, fair value		0
Debt securities		$ 10,329	$ 10,278

[1]     Available-for-sale investment securities and held-to-maturity investment securities are presented net of allowance for credit losses of $0 and $241, respectively, at March 31, 2023 and December 31, 2022.